<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>后盾人</title>
  </head>
  <body>
    <script>
      // Math
      // console.log(Math.min(1, 2, 3, 4, 5));
      // let grade = [12, 3, 2, 124];
      // console.log(Math.max(grade));
      // console.log(Math.max.apply(null, grade)); //apply call
      // Math.max(12, 3, 2, 124)
      // console.log(Math.ceil(5.01));
      // console.log(Math.floor(5.001));
      // console.log((5.556).toFixed(2));
      // console.log((5.556).toFixed(2));
      // console.log(Math.round(5.56));
    </script>
  </body>
</html>
